/*
    Gtalk is a videoconference application on the Android Platform.

    Copyright (C) 2009 by Frederic-Charles Barthelery,
                          Jean-Manuel Da Silva,
                          Nikita Kozlov,
                          Philippe Lago,
                          Jean Baptiste Vergely,
                          Vincent Veronis.

    This file is part of Gtalk.

    Gtalk is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Gtalk is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Gtalk.  If not, see <http://www.gnu.org/licenses/>.

    Please send bug reports with examples or suggestions to
    contact@Gtalk-project.com or http://dev.Gtalk-project.com/

    Epitech, hereby disclaims all copyright interest in the program "Gtalk"
    written by Frederic-Charles Barthelery,
               Jean-Manuel Da Silva,
               Nikita Kozlov,
               Philippe Lago,
               Jean Baptiste Vergely,
               Vincent Veronis.

    Nicolas Sadirac, November 26, 2009
    President of Epitech.

    Flavien Astraud, November 26, 2009
    Head of the EIP Laboratory.

 */
package org.lansir.af.gtalk.smack.avatar;

import org.jivesoftware.smack.packet.PacketExtension;
import org.jivesoftware.smack.provider.PacketExtensionProvider;
import org.xmlpull.v1.XmlPullParser;

/**
 * A PacketExtensionProvider to parse the Avatar metadata. XML namespace
 * urn:xmpp:avatar:metadata
 */
public class AvatarMetadataProvider implements PacketExtensionProvider {

	/**
	 * Creates a new AvatarMetadataProvider. ProviderManager requires that every
	 * PacketExtensionProvider has a public, no-argument constructor
	 */
	public AvatarMetadataProvider() {
	}

	@Override
	public PacketExtension parseExtension(XmlPullParser parser) throws Exception {
		AvatarMetadataExtension metadata = new AvatarMetadataExtension();
		boolean done = false;
		StringBuilder buffer = new StringBuilder();
		while (!done) {
			int eventType = parser.next();
			if (eventType == XmlPullParser.START_TAG) {
				if ("info".equals(parser.getName())) {
					String id = parser.getAttributeValue(null, "id");
					String type = parser.getAttributeValue(null, "type");
					String sbytes = parser.getAttributeValue(null, "bytes");
					String sheight = parser.getAttributeValue(null, "height");
					String swidth = parser.getAttributeValue(null, "width");
					int bytes = 0;
					AvatarMetadataExtension.Info info = null;
					try {
						if (sbytes != null)
							bytes = Integer.parseInt(sbytes);
					} catch (NumberFormatException e) {
					}
					if (bytes != 0 && id != null && type != null)
						info = new AvatarMetadataExtension.Info(id, type, bytes);
					else
						// invalid info
						continue;

					String url = parser.getAttributeValue(null, "url");
					info.setUrl(url);
					try {
						int height = 0;
						int width = 0;
						if (sheight != null)
							height = Integer.parseInt(parser.getAttributeValue(null, "height"));
						if (swidth != null)
							width = Integer.parseInt(parser.getAttributeValue(null, "width"));
						info.setHeight(height);
						info.setWidth(width);
					} catch (NumberFormatException e) {
					}
					metadata.addInfo(info);
				}
			} else if (eventType == XmlPullParser.END_TAG) {
				if (parser.getName().equals(metadata.getElementName())) {
					done = true;
				}
			}
		}
		return metadata;
	}
}
